I've met a few over my 40-odd years of life...
When I was in senior school, my parents had to finally intervene and complain about the deputy head who had targeted me for having the audacity to correct him about the reasons as to why English Armed Forces were deployed into NI - and about the fact that he was trying to groom his students to support the IRA... (I went to a RC school, and am an Army Brat whose parents were both deployed to NI at the height of "the troubles". I also understand the history of the conflict). After that, he'd make snide comments about me if he passed me in a corridor, or single me out for verbal abuse if he had to sub one of our RE classes - despite supposedly being forbidden to go anywhere near me. When I applied for the 6th form attached to the school, for who-knows-what reason he was the one who interviewed me (with another teacher present, whom I'd asked for). He essentially told me that I was "too stupid" to do 'A'-levels, was "only capable" of doing a BTEC (which were just being rolled out across the UK at the time as an alternative for those who were in lower sets/had SEN at schools - now, they're great, but back then? Not so much!), and ought to "stop wasting the school's resources" by continuing to attend. Again, my parents intervened. This time, he stayed absolutely clear of me, so I dread to think what our matriarch of a headteacher said to him.
Then there's the family member who sexually assaulted me as a 7 year old, blamed me when confronted by his mother (who was the only adult I ever told about it at the time), lied to my father's face, turned their other brother completely against me to the point where he's been known to totally blank me and sneer about how I had my oldest out of wedlock, as a terrified 19-year-old. When my uncle was on his death-bed, I finally told my father what had happened (I snapped when my father kept going on about what a good man his "baby brother" was...), got a blank look and then: "I don't believe you. [X] would never do something like that to you...!". Except, he did. The other brother still pretends that I and my children (both illegitimate) simply don't exist, and says it's because I wasn't married when I had either one of them (he's not religious in the slightest!). I have to confess to laughing myself sick when it turned out that both of his children... have children "out of wedlock". Because of my uncles, though, I have no relationship with their children whatsoever. When my grandmother died, the oldest son of the uncle who abused me threatened to kill me if I showed up at her funeral. So... yeah. They're pretty horrific people, too.
My so-called-childhood-best-friend who picked me up and put me down according to her mood. However, that's not why she's horrific. She's horrific because she broke her 3 month old son's femur - leaving him with a permanent limp, as she then refused to seek medical treatment. I know what she did, because when he was a toddler, and the limp became noticeable, I asked what was up. Had he sprained his ankle, or twisted his knee...? She laughed about what she'd done to him. This was someone who was my oldest's Godmother. Needless to say, we're not friends anymore. SS did investigate her son, when it was flagged by a GP - and she and her oldest spent a lot of time in a mother-and-baby unit as a result. But presumably, as she has two younger children, and full custody of her oldest, the case was closed.
My oldest's biological "father". He was abusive in every which way you can imagine - got me to give him money for his "rent" (which I later found out he didn't pay to his parents...), beat me, raped me, whittled away my self-esteem, and isolated me to the point that I had one friend who stood by me during my entire pregnancy (I found out after I'd left him and was given absolutely the wrong information concerning how far along I was, so ended up becoming a mother). During the pregnancy (which my parents informed him/his family about), he'd call and threaten me. After my daughter was born, he faked being interested in seeing her (which I was never happy about, but out-voted) until he realised that I was beyond being able to abuse anymore. He kept showing me naked photographs of his then-girlfriend when I was 2 weeks post-partum... and threw a tantrum in the street when I said "...so?!" and asked him if she knew he was showing me what she looked like naked, because I'd be more than happy to tell her. To the best of my knowledge, he's not seen my daughter since she was 3 weeks old (and she turns 25 in a few weeks). His parents and sister, too, were nasty pieces of work. Stalked my daughter through college, when she said she wanted nothing to do with her, leaving her terrified of being outside the house alone. And I suspect his father was inappropriate with her, although I can't prove that, and my daughter claims not to remember - having suddenly, at the age of 7, randomly decided to have nothing more to do with any of them. Every now and then the sister will pop up, essentially blaming me for keeping them apart, and "now [daughter]'s an adult..." they can resume contact - so either they're ignorant of the fact that it was my daughter's choice to drop them (much to my relief, as it happens), or arrogant enough to believe that I instigated it (which I'd always semi-trusted them not to hurt her, so left it entirely up her as to if/when she had contact with them). I used to be on "high-alert" whenever she was with them, though, so obviously I subconsciously knew something was going on. The apple seemingly didn't fall too far from the tree - or its fellow fruit...
At the end of the day, though - I've rebuilt my life, my self-esteem, my entire life. They can't hurt me anymore. I worry about my daughter slipping back into her paternal family's grasp... but she's an adult. She has to make her own choices. And generally? I'm pretty content as a person now, with a fabulous relationship with all of the friends who my abusive ex did his utmost to isolate me from (they came flocking when they realised he was gone/I was alone with a new baby). So, very often, there is hope.